Fix for: node validation after source without returnType with broken graph structure caused: failed cursor: DownField(type),DownField(input),DownField(variableTypes) (#1278)
Fix for: node validation after source without returnType with broken graph structure caused: failed cursor: DownField(type),DownField(input),DownField(variableTypes) (#1278)


TouK/nussknacker,TouK/nussknacker,TouK/nussknacker,TouK/nussknacker,TouK/nussknacker